Evolution Of Species

Question 1

Species

Answer 1

A group of organism that can interbreed to produce fertile offspring

Question 2

Variation

Answer 2

Genetic differences between members of same species

Question 3

Mutation

Answer 3

Random, spontaneous and permanent change to genetic material which alters the structure of proteins that an organism is able to produce

Question 4

Rate of Mutation

Answer 4

Can be increases by exposure to environmental factors

Question 5

Environment Factors affecting Mutation

Answer 5

Radiation and Harmful Chemicals

Question 6

Benefits Of Mutation

Answer 6

Mutations may be neutral, confer an advantage or disadvantage to survival

Question 7

Mutation Alleles

Answer 7

Only source of new alleles within a population

Question 8

Benefit of new alleles

Answer 8

New alleles produced by mutation can result in plant and animals becoming better adapted to their environment

Question 9

Effect of Variation

Answer 9

Variation allows population to evolve over time in response to changes in environment conditions

Question 10

Adaptation

Answer 10

Inherited characteristics that make an organism well suited to survive within its environment

Question 11

Types of Adaptation

Answer 11

Structural and Behavioural

Question 12

Natural Selection(survival of the fittest organism)

Answer 12

Occurs when selection pressured are present in an environment. Only the best adapted individuals survive and reproduce

Question 13

Favourable Alleles Natural Selection

Answer 13

Natural selection increases the frequency the favourable alleles that present a selective advantage with the population

Question 14

Summed Up

Answer 14

Mutations lead to variation where organism can adapt to changes in environment

Question 15

Summed Up

Answer 15

Mutations lead to variation where organism can adapt to changes in environment

Question 16

Stages of Antibiotic Resistance

Answer 16

-One mutant bacteria arrives spontaneously within its population
- Mutant bacteria has a selective advantage to the antibiotic that it is expose to and survives
- Mutant bacteria reproduces to make more resistant bacteria.
- One of these mutant bacteria has a selective advantage to a second antibiotic and survives
- Mutant bacteria reproduces to make more resistant bacteria

Question 17

Speciation

Answer 17

-Occurs when two or more new species come from one common ancestor
-Speciation occurs after part of a population becomes isolated by an isolation barrier, which can be geographical, ecological or behavioural.